<!-- Layer -->

<template>
  <div><u-select value="C">
    <u-select-item value="A">苹果</u-select-item>
    <u-select-item value="B" flag layer="high">香蕉</u-select-item>
    <u-select-item value="C" flag="默认选项" layer="high">蛋糕</u-select-item>
</u-select></div>
</template>